overlay life 中文意思是什麼
overlay life
解釋
罩面使用年限-
But, for the reflective cracking of asphalt pavement with half rigid base course and the cracking of the ac overlay above joints ( cracks ) in existing pcc pavement, the results of research show that the fatigue life of ac layer is mainly the life of the crack propagating stage. so the theory and method of fatigue destructive mechanics ( fatigue fracture mechanics and fatigue damage mechanics ) should be used to study and design the pavement structures instead of traditional fatigue mechanics
而對於半剛性基層反射裂縫和舊水泥混凝土路面瀝青混凝土加鋪層接縫（裂縫）開裂，研究發現，瀝青結構層的疲勞壽命主要為裂縫擴展階段的壽命，此時不應採用傳統的疲勞力學進行研究和結構層設計，而應採用疲勞破壞力學（疲勞斷裂力學和疲勞損傷力學）理論與方法。 -
In this paper, the theory and method of fatigue damage mechanics are adopted to study the fatigue damage behavior of asphalt mixture and the fatigue failure of asphalt pavement and predict the fatigue life of ac overlay on existed pcc pavement
本文應用疲勞損傷力學理論與方法對瀝青混合料的疲勞損傷特性、瀝青類路面疲勞破壞以及舊水泥混凝土路面瀝青混凝土疲勞壽命預測進行了系統的研究。 -
Periodic maintenance and rehabilitation can prolong the road ' s service life. an asphaltic overlay is applied to the old pavement surface in good time, which not only enhances the strength of the pavement, but also improves the using performance of the old pavement instead of doing lots of rebuilding works. therefore, the thickness of asphalt concrete overlays is less than the thickness of the reconstructed pavement
定期的養護與維修可以延長瀝青路面的使用壽命，及時地在瀝青路面上加鋪罩面，不僅可以增強路面強度，還可改善路面的使用性能，而不必做大量的重建工作，其厚度也小於重建施工的厚度，因此對于已破損的路面，採用瀝青混凝土罩面常可以提供最經濟的修復形式。
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